Praying Mantis™ Low Temperature Reaction Chambers

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Diffuse reflection spectroscopy is a very sensitive method for detecting changes at the surfaces of rough materials. It is particularly effective for powders that have high surface areas. This makes diffuse reflectance invaluable for studies of heterogeneous catalysis, gas-solid interactions, photochemical reactions, and oxidation mechanisms. This Low Temperature Reaction Chamber is well suited for performing such studies under carefully variable temperatures and pressures. These Low Temperature Reaction Chamber allow diffuse reflection measurements under a wide range of controlled temperatures and pressures and are used in conjunction with the Praying Mantis Accessory for FT-IR and UV-Vis diffuse reflectance spectroscopy.

Low Temp. Reaction Chamber (FTIR)
Praying Mantis™ diffuse reflection environmental chamber, 24V
Model No.
CHC-CHA-3
Price
N/A
Low Temp. Reaction Chamber (UV-Vis-NIR)
Praying Mantis™ diffuse reflection environmental chamber, 24V
Model No.
CHC-VUV-3
Price
N/A
NOTE: A Model No. ending in "XXX" denotes spectrometer code.

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Features
  • Designed for studies from high vacuum (133 μPa or 10-6 torr) to 133 kPa (1 ktorr) and at temperatures from -150°C to 600°C (under vacuum).
  • Three inlet/outlet ports provided for evacuating the cell and introducing gases.
  • Made of chemically resistant 316 stainless steel.
Includes
  • Reaction Chamber
  • Low-voltage heating cartridge.
  • K-type thermocouple.
  • Sample packing tool and spill tray.
  • Dome with two KBr windows and one glass observation window (FTIR configuration)
  • Dome with two SiO2 windows and one glass observation window (UV-Vis-NIR configuration)
 
Model No. Product Description Price
ATC-024-3 Temperature Controller, 110V

Tabletop model

N/A
ATC-024-4 Temperature Controller, 220/240V

Tabletop model

N/A
ATK-024-3 Temperature Controller Kit, 110V

Includes 110V Temperature Controller and USB to RS-485 Adapter

N/A
ATK-024-4 Temperature Controller Kit, 220/240V

Includes 220/240V Temperature Controller and USB to RS-485 Adapter

N/A
DRK-3-XXX Diffuse Reflection Catalysis Package, 110V

Kit with Praying Mantis, Reaction Chamber, Controller, etc.

N/A
DRK-4-XXX Diffuse Reflection Catalysis Package, 220V

Kit with Praying Mantis, Reaction Chamber, Controller, etc.

N/A
DRP-XXX Praying Mantis™

Diffuse reflection accessory

N/A
VPE-001 Vacuum Pump

Dual-stage oil sealed rotary vacuum pump

N/A
VPE-002 Vacuum Pump

Dual-stage oil sealed rotary vacuum pump

N/A
 
Model No. Product Description Price
007-085 VCO to Swagelok Adapter (English) 1/4" female VCO to 1/4" Swagelok N/A
116-998 VCO to Swagelok Adapter (Metric) 1/4" female VCO to 6 mm Swagelok N/A
ATC-USB-485 Temperature Controller USB to RS-485 Adapter For use with the Temperature Controller N/A
CHC-POK Pump-Out Port Tool Kit To evaculate the Low Temp. Reaction Chamber dewar N/A
DRP-ASC Ambient Chamber (FTIR) for Praying Mantis Air-tight enclosure for diffuse reflectance N/A
DRP-ASC-VUV Ambient Chamber (UV-Vis-NIR) for Praying Mantis Air-tight enclosure for diffuse reflectance N/A
HVC-DWA-2 Standard Reaction Chamber Dome, SiO₂ Dome for Praying Mantis Reaction Chambers N/A
HVC-DWI-2 Standard Reaction Chamber Dome, ZnS Dome for Praying Mantis Reaction Chambers N/A
HVC-DWM-2 Standard Reaction Chamber Dome, ZnSe Dome for Praying Mantis Reaction Chambers N/A
HVC-DWP-2 Standard Reaction Chamber Dome, KBr Dome for Praying Mantis Reaction Chambers N/A
Windows
Model No. Product Price
WMD-U23 Window ZnSe 15 x 2 mm $149.00
WLD-U23 Window NaCl 15 x 2 mm $48.00
WHD-U23 Window BaF₂ 15 x 2 mm $119.00
WFD-U23 Window CaF₂ 15 x 2 mm $71.00
WPD-U23 Window KBr 15 x 2 mm $57.00
WAD-U23 Window SiO₂ 15 x 2 mm $51.00
WED-U23 Window Si 15 x 2 mm N/A
Other
Model No. Product Price
008-144 Thermocouple, K-Type $103.00
116-439 Screen Set (2 each of the three sizes), 6.3 mm dia. $110.00
116-439-1S Screen Set (6), pore size 0.104 mm (0.0041"), 6.3 mm dia. $110.00
116-439-2S Screen Set (6), pore size 0.061 mm (0.0024"), 6.3 mm dia. $110.00
116-439-3S Screen Set (6), pore size 0.038 mm (0.0015"), 6.3 mm dia. $110.00
O-Rings & Gaskets
Model No. Product Price
ORK-001 Kalrez O-Ring, 0.109 OD, 0.029 ID $66.00
ORV-001 Viton O-Ring, 0.109 OD, 0.029 ID $8.00
ORV-026 Viton O-Ring, 1.379 OD, 1.239 ID $9.00
ORK-026 Kalrez O-Ring, 1.379 OD, 1.239 ID $98.00
CHC-ORV Viton O-Rings for Low Temp. Reaction Chambers $75.00
CHC-ORK Kalrez O-Rings for Low Temp. Reaction Chambers $650.00
ORK-010 Kalrez O-Ring, 0.379 OD, 0.239 ID $66.00
ORV-010 Viton O-Ring, 0.379 OD, 0.239 ID $8.00
ORK-023 Kalrez O-Ring, 1.191 OD, 1.051 ID $72.00
ORV-023 Viton O-Ring, 1.191 OD, 1.051 ID $9.00
ORK-013 Kalrez O-Ring, 0.566 OD, 0.426 ID $72.00
ORV-013 Viton O-Ring, 0.566 OD (15 mm), 0.426 ID $8.00
116-429 PTFE Washer, OD 0.59" (15mm) $7.00
ORV-011 Viton O-Ring, 0.441 OD, 0.301 ID $8.00
Heaters
Model No. Product Price
CHC-HTR Heater Assembly for the Low. Temp. Chamber $255.00
HTRS-16 Cartridge Heater, 0.250" x 1.25", 24V/100W $94.00
Low Temperature Reaction Chamber

Harrick Scientific offers a Low Temperature Reaction Chamber for use with the Praying Mantis Diffuse Reflection Accessory for analysis of powders and other rough-surfaced materials in a controlled environment at controlled temperatures and pressures.

This reaction chamber is made from chemically resistant 316 stainless steel and incorporates a sample cup within a temperature-controlled sample stage. This stage incorporates a cartridge heater and K-type thermocouple. The stage is thermally isolated from the outer chamber. A water-cooling jacket is provided to control the temperature of the outer chamber and windows during high and/or low temperature operation. The reaction chamber also features three gas ports for evacuating or flowing gas through the sample. These ports have 1/4” VCO fittings with Viton o-rings. One of these ports leads directly under the sample cup; the other two lead into the sides of the chamber.

Optically, the Low Temperature Reaction Chamber is designed to maximize light interaction with the sample while minimizing reflection losses from the windows. The radiation enters and exits the chamber perpendicular to the two optical apertures. A third aperture is provided for viewing, illuminating or irradiating the sample. This reaction chamber includes two KBr windows and a glass observation window for the FTIR or two SiO2 windows and a glass observation window for the UV-Vis-NIR. These windows are mounted in a removable stainless steel dome using o-ring seals. This reaction chamber can be operated from high vacuum to two or three atmospheres with the KBr or SiO₂ and glass windows provided. Other window materials are available for different wavelength regions. Low refractive index window materials should be selected to minimize reflection losses.

This Low Temperature Reaction Chamber is designed for operation from -150°C to 600°C (under vacuum) and from high vacuum (133 µPa or 10-6  torr)  to 133 kPa (1 ktorr). At higher pressures, the maximum attainable temperature might be lower, due to heat losses that depend upon thermal charactericstics of the sample, reactant gas, and gas pressure. In addition to the heater incorporated into the sample stage, the Low Temperature Chamber also features a cooling conduit connected to a dewar. The dewar can be filled with liquid nitrogen or other coolant to cool the sample stage below room temperature. For optimal temperature control, Harrick Scientific recommends our Temperature Controller for stable heating of the system, both above and below room temperature. Heater and thermocouple connectors are compatible with this controller.

To evacuate this chamber, use our highly reliable, compact, low-noise level Vacuum Pump with a minimum pumping speed of 1.4m³/hr. Compliant with international standards, it is ideally suited both for use with Harrick equipment and for general use in chemistry and research laboratories. Hermetically sealed by oil pressure controlled valves, the vacuum chamber is protected against inadvertent venting and oil backstreaming. This vacuum pump is supplied with a three foot length of ½” ID vacuum tubing and with the hardware to connect this tubing to the pump. The hardware to connect this tubing to the Low Temperature Reaction Chamber is also included.